Aphids.

[juke]

Why would an Agronomist want to send out insecticides for aphids when there is abslouteley no sign of them being in crop ? Is that just a covering there own backside job? ..

He was told that unless there is a problem there it definitely isn't going on too much risk to beneficals

 

[neilo]

Why would an Agronomist want to send out insecticides for aphids when there is abslouteley no sign of them being in crop ? Is that just a covering there own backside job? ..

He was told that unless there is a problem there it definitely isn't going on too much risk to beneficals

Maybe so that you’ve got it ready in case you need to go in quickly? Or maybe it’s a serviced agronomist that earns aa commission on sales?

Relatively cheap spray to have on the shelf ready though?

 

[Feldspar]

Deter treated seed? How many days since crop emergence?

Some agronomists give the rest a bad name. There is no need to have to quickly spray (cereals) for aphids at this time of year. If they're saying that, they don't understand the nature of the problem and should find another job.

 

[juke]

It's been through a couple weeks , yes seeds we're treated with redigo .. there's too many beetles n spiders in the fields to commit genocides like this ..

 

[juke]

Maybe so that you’ve got it ready in case you need to go in quickly? Or maybe it’s a serviced agronomist that earns aa commission on sales?

Relatively cheap spray to have on the shelf ready though?

Independent guy..

 

[Feldspar]

It's been through a couple weeks , yes seeds we're treated with redigo .. there's too many beetles n spiders in the fields to commit genocides like this ..

Redigo or Redigo Deter? Few weeks is quite a long time and certainly would mean crop begins to be at risk again even if treated with Deter.

The whole problem with BYDV is the data on yield effects from infection is pretty much non-existent. It's a case of balancing a harm to beneficials against some possible large / possibly not large effect.

 

[Ugo79]

What insecticide product/active have you been sent? Peach Potato aphids prolific around here in OSR crops and looking at AHDB aphids news there has been a massive increase in other regions in the last 7 days.

https://cereals.ahdb.org.uk/media/1444510/Aphid-News-20181012.pdf

 

[juke]

Redigo or Redigo Deter? Few weeks is quite a long time and certainly would mean crop begins to be at risk again even if treated with Deter.

The whole problem with BYDV is the data on yield effects from infection is pretty much non-existent. It's a case of balancing a harm to beneficials against some possible large / possibly not large effect.

With deter, some with redigo pro which I know is diffrent

 

[juke]

Redigo or Redigo Deter? Few weeks is quite a long time and certainly would mean crop begins to be at risk again even if treated with Deter.

The whole problem with BYDV is the data on yield effects from infection is pretty much non-existent. It's a case of balancing a harm to beneficials against some possible large / possibly not large effect.

What insecticide product/active have you been sent? Peach Potato aphids prolific around here in OSR crops and looking at AHDB aphids news there has been a massive increase in other regions in the last 7 days.

https://cereals.ahdb.org.uk/media/1444510/Aphid-News-20181012.pdf

None , he was told it wasn't wanted

 

[Zippy768]

To be fair if your crop succumbs to bydv - distinct possibility if barley - you will blame your Agronomist. Cheap insecticides make decisions easy.
That being said, still a little early. Deter crops are protected for six weeks from emergence.

 

[Feldspar]

With deter, some with redigo pro which I know is diffrent

Ask him to show you them in the crop. One of our agronomist says they're like rats, if you see one, there's a lot there. In the end I think with no good data on yield effects, it comes down to your philosophy to adjudicate between competing harms.

We have planted barely with Deter and won't spray for aphids almost regardless. All wheat planted without any dressing at all and emerging now. I will be very reluctant to spray for aphids in wheat, but won't rule it out in extreme circumstances.

 

[Feldspar]

To be fair if your crop succumbs to bydv - distinct possibility if barley - you will blame your Agronomist. Cheap insecticides make decisions easy.
That being said, still a little early. Deter crops are protected for six weeks from emergence.

Good point. Getting my facts wrong there.

 

[Hindsight]

Read the attached. You will then have some solid information about Deter for its last year.

https://cereals.ahdb.org.uk/monitoring/aphid-news/bydv-management-tool.aspx

And the BYDV tool to manage timing of pyrethroids.

 

[Zippy768]

Ask him to show you them in the crop. One of our agronomist says they're like rats, if you see one, there's a lot there. In the end I think with no good data on yield effects, it comes down to your philosophy to adjudicate between competing harms.

We have planted barely with Deter and won't spray for aphids almost regardless. All wheat planted without any dressing at all and emerging now. I will be very reluctant to spray for aphids in wheat, but won't rule it out in extreme circumstances.

Like you Deter treated crops here will not see an insectide unless an extreme situation arises. Will make next year very interesting once that treatment is gone.

Surprised to hear that there is little data on yield effects. I can vouch that a badly affected wb is hopeless, and surely yields are proportional to infection levels.

 

[Feldspar]

Like you Deter treated crops here will not see an insectide unless an extreme situation arises. Will make next year very interesting once that treatment is gone.

Surprised to hear that there is little data on yield effects. I can vouch that a badly affected wb is hopeless, and surely yields are proportional to infection levels.

I struggled to find any yield effects averaged over several years. Infection not known until too late so can only go on aphid numbers relative to average. I am rather dismayed to read in that link that the numbers in this area are very high compared to the ten year average. Bummer.

 

[Clive]

Great stiff this deter - how will anyone grow wheat without it ? !

Some agronomists clearly think it’s so essential they still treat as if it hadn’t been applied

At least it’s cheap ........... oh hang on !

you couldn’t make it up sometimes !

 

[Zippy768]

Great stiff this deter - how will anyone grow wheat without it ? !

Some agronomists clearly think it’s so essential they still treat as if it hadn’t been applied

At least it’s cheap ........... oh hang on !

you couldn’t make it up sometimes !

OP didn't say it was wheat he had the recs for

 

[Zippy768]

Read the attached. You will then have some solid information about Deter for its last year.

https://cereals.ahdb.org.uk/monitoring/aphid-news/bydv-management-tool.aspx

And the BYDV tool to manage timing of pyrethroids.

Great link. Always seems there is not enough research and surveys to monitor levels. More disconcerning to speak to agronomust in November and them not know local aphid levels

 

[juke]

OP didn't say it was wheat he had the recs for

barley and wheat...

 

[juke]

is there any know resistance in aphids to pyrethroids ?